Fritz Zwicky

Fritz Zwicky was a Swiss astronomer. He worked most of his life at the California Institute of Technology in the United States of America, where he made many important contributions in theoretical and observational astronomy. In 1933, Zwicky was the first to use the virial theorem to postulate the existence of unseen dark matter, describing it as "dunkle Materie".

14 February 1898

Born on the same birth date (14 February 1898): Bill Tilman

Born on the same birth day (14 February): Bill Tilman • Calle Johansson • Chris Babb • February 14 • Gao Lin • Gheorghe Mureșan • Jaan Tallinn • Jay Hebert • Jimmy Hoffa • Johnny Longden • Kevin Keegan • Leon Battista Alberti • Lucrezia de' Medici, Duchess of Ferrara • Magic Sam • Margaret E. Knight • Milan Hejduk • Pat O'Brien (radio and television personality) • Ricardo Rodríguez (racing driver) • Rob Thomas (musician) • Walenty Wańkowicz

Born in the same month (February 1898): Alvar Aalto • Ante Ciliga • Bill Tilman • Harry Haywood • Hubert Ashton • Joseph Kessel • Jūkichi Yagi • Leo Szilard • Luis Muñoz Marín • Zeki Rıza Sporel